Rich markmann



No. 623.799. Patented Apr. 25, I899. J. H. F. MARKMANN.

SHEET DELlVERY APPARATUS FOR PLATEN PRINTING PBESSES.

(Application filed Sept. 16, 1898.)

2 Sheets$heet I.

(No Model.)

n4: Nonms PEYERS on. PnoTo-Lm-u, wnsnmamn. u. c.

Patented Apr. 25', I899.

J H. F. MARKMANN. SHEET DELIVERY APPARATUS FOR PLA'TEN PRINTING PRESSES.

(Application filed Sept. 16, 1898.)

2 Sheets--Sheat 2.

(No Model.)

UNTTED- TATES PATENT FFTQBt JOHANN HINRICH FRlEDRICH-MARKMANN, OF HAMBURG, GERMANY, ASSIGNOR TO ROOKSTROHK: SCHNEIDER NACHFOLGER, OF LOBTAU,

GERMAN Y.

SHEET-DELIVERY APPARATUS FOR P LATEN PRINTING-=PRESSES.

SPEGIFICATION forming part of Letters Patent No. 623,799, dated April 25, 1899.

Application filed $eptember 18,1898. Serial No. 691,089. (No model.)

To all whom/i1; may concern.-

Be it known that I, J OHANN HINRI'OH FRIED- RICH MARKMANN, a subject of the German Emperor, and a resident of Hamburg, in the German Empire, have invented a new and useful Improvement in Sheet-Delivery Apparatus for Platen Printing-Presses, of which the following is a specification.

The peculiarity of this new sheet-delivery device consists in that a delivery-strap winding on and unwinding from a drum and held down upon the platen by spring-pressure is moved over the platen and against the edge of the printed sheet when the platen swings back from the type-form of the foundation.

Figures 1, 2, and 3 of the drawings are respectively a plan, a longitudinal section, and a cross-section showing the device arranged laterally of the platen. Figs. 4 and 5 are views 011 a smaller scale, showing two positions of the platen with the new device. Figs. 6 and 7 show details.

On the platen a there is provided a support 1) for an axle c, which is fixed or incapable of rotation and on which there are arranged side by side a sleeve d, which is capable of rotating, and a casing e, which is not capable of rotation or of end motion. The sleeve 61 carries a bevel-wheel f, which engages with a bevel-wheel f on a short shaft or stud which is affixed to the platen at right angles to the axle c. The 'said sleeve (1 has provided withinit a longitudinal groove d of dovetail-shaped cross-section, and into this groove is inserted a little block 7?. of corresponding form, which is clamped in a suitable position in said groove by means of a screw-pin h, which is screwed through said block and bears on the bottom of the groove (1'. The head of this pin projects through an oblique slot 1) in an outer sleeve 1, which is capable of a limited longitudinal movement on the sleeve cl, to which it is fitted. By the turning of the sleeve 2' on the sleeve d or turning the latter in the former the head of the pin it, working in'the oblique slot, is first caused to move the sleevet' lengthwise a short distance on that d,and then the two are caused to turn together. The outer sleeve 6 is pro vided with dogs or drivers 2' opposite to a toothed ratchet-ring 76 provided on the edge of the drum is, which is arranged to rotate within the fixed casing e and is connected to one end of a spring Z, which is coiled within said drum and the other end of which is fixed to a sleeve on on the axle c. The sleeve m is connected to the hub of the fixed casing e by means of a screw n, and after the screw has been slackened can be turned for the purpose of tensioning the springl more or less. A clamping-collar 0 on the axle c secures the drum 7c and its ratchet-ring from axial displacement.

To the drum is there is connected one end of the delivery-strap p, which is made of spring-steel and the other end of which projects from a slot of the casing e and carries a shoe p and, with the latter, is always held down firmly by the resiliency of the strap against the upper-surface of the platen. This holding down is of special im portance,because it guarantees a secure taking of the shoe 1) behind the sheet.

hen the platen rocks back from the typeform, a frictional driving-roller 0", having a roughened face, attached to the bevel-wheel f rolls along a fixed path 8 and rotates the bevel-wheels f f and the sleeve (1, which latter by the action of its pin 7b in the slot i first moves the sleeve 1' lengthwise far enough to engage the dogs 1' with the ratchet-ring 71:

and then turns the said sleeve 7; with it and so causes the drum to turn in the direction to move the delivery-strap p 1) forward against the printed sheet 25 and push the latter down from off the platen and at the same time wind up and produce tension of the spring Z. When the roller 0 passes beyond the path 3, the spring Z quickly turns back the drum 7; and so winds up and draws back the deliverystrap. During the first part of this turningback movement the ratchet-ring by its action on the dogs 2' turns back the sleeve 1' far enough to move the said sleeve lengthwise sufficiently to withdraw the dogs from the ratchet-teeth. When the platen is rocked forward against the type-form, the sleeves d and i are rotated together in the reverse direction; but the dogs 1' being then disengaged from the ratchet-teeth the drum and the delivery-strap remain at rest. On slackening the clamping-collar 0 and screw-pin 71. the carrying-sleeve m, together with the outer sleeve 'i and the drum and ratchet mechanism, can be adjusted axially along the axle c for the purpose of shifting the delivery-strappp to a suitable place on the platen.

Instead of roughened roller 7 a grooved wheel 2" on a wedge-shaped track .9 may be employed for driving the bevel-Wheels f f, Fig. 7.

In Figs. 1 and 3 there are represented on the platen gages a for the placing of the sheet 25; but these are immaterial to my invention.

' hat I claim as my invention is- 1. In asheet-delivery apparatus for platen printing-presses,thc combination with a rocking platen, of a flexible and resilient deliverystrap 1) provided with a shoe bearing on the surface of the platen, a d rum attached to the platen and connected with said strap, and mechanism actuated by the rocking of the platen for turning said drum and moving said strap across the platen-surface, substantially as herein described.

2. In a sheet-delivery apparatus for platen printing-presses, the combination with a rocking platen, of a flexible and resilient deliverystrap provided with a shoe bearing on the surface of the platen, a drum carried by the platen and to which said strap is attached, a spring for turning said drum in the direction for winding said strap thereon, a ratchet mechanism for turning said drum in the opposite direction for producing the outstroke of said strap, and means for throwing said ratchet mechanism into and out of engagement, substantially as herein described.

3. In a sheet-delivery apparatus for platen printing-presses, the combination with a rocking platen, of a flexible and resilient deliverystrap provided with a shoe bearing on the surface of the platen, a drum carried by the platen and to which said strap is attached, a spring for turning said drum in the direction for winding up the strap, mechanism for turning said drum in the opposite direction to produce the outstroke of said strap, said mechanism including a frictional drivingroller and afixed track on which said roller is caused to run by the rocking of the platen for the purpose of actuating said mechanism, substantially as herein described.

t. In a sheet-delivery apparatus for platen printing-presses, the combination with a rocking platen, of an axle c affixed to the platen, a drum 7G fitted to turn on said axle and provided with ratchet-teeth a flexible and resilient delivery-strap 1) one end of which is attached to said drum and the other end is furnished with a shoe 1) bearing on the surface of the platen, a spring I eoiled'within the drum 7a and having its ends connected with said drum and axle respectively for turning the drum in one direction, a sleeved fitted to turn on said axle and furnished with a bevel-gearf, a second sleeve 1' fitted to said sleeve d and capable of moving lengthwise thereon, a dog 1' on said sleeve 2' for opera tion in said ratchet-teeth, a pin it on said sleeve (1 working in an oblique slot 2' in said sleeve i for engaging and disengaging said dog with and from said ratchet-teeth, a bevelgear f carried by the platen and. gearing with said bevel-gearf, a friction-roller r attached to said bevel-gear f and a fixed track 8 on which said bevel-gear is caused to run by the rocking of the platen, all substantially as and for the purpose herein specified.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 30th day of August, 1898.

JOIIANN llINltlCll FRIEDRICH MARKMANN.

Witnesses:

REINHARD OSTERMEYER, MAX KAEMPFF. 

